$pdo->sqliteCreateFunction('square', function($num) { return $num*$num; }); // Usage: $query = $pdo->query('SELECT square(5)'); // => 25
$pdo->sqliteCreateFunction('concat', function($str1, $str2) { return $str1.$str2; }); // Usage: $query = $pdo->query('SELECT concat("Hello, ", "World!")'); // => "Hello, World!"
$pdo->sqliteCreateFunction('factorial', function($num) { if($num < 0) return null; if($num == 0) return 1; return $num * factorial($num-1); }); // Usage: $query = $pdo->query('SELECT factorial(5)'); // => 120The package library used in these examples is PDO, which is a database access layer that provides a consistent interface for accessing various databases, including SQLite.